amazon Hifiman EF5 reviews
Hifiman EF5 Headphone Amplifier
Just like with large speakers, headphones always need the high power, high quality of the sound source to perform best. The Hifiman EF5 Headphone Amplifier is an amplifier between light and semiconductor devices that delivers distinct processing power, making the music dynamic, detailed, with the warmth and clarity of a plus light. With strong, deep, dynamic bass characterized by semiconductor. Hifiman EF5 wide band response, its low distortion, high signal-to-noise ratio makes the Hifiman EF5 easy to select.
Hifiman EF5 is a two-box design. The most noticeable change from Hifiman’s EFI headphones to the EF5 is the discrete DY-1 power supply, which provides a more stable source of power and provides cleaner signals. In addition, there are some other improvements inside the new amplifier. The second box is a separate power supply box, separated from the main unit to avoid negative interference and increase the power when the power supply is adequate for the main operation in real time. Hifiman EF5 is a hybrid amplifier design that uses 12AU7 bulbs at the input, and a socketed OP275 op-amp on the output circuit. This design allows to change the vacuum ball, change the op-amp or change the two circuits, this circuit to change the sound. The manufacturing quality of the amplifier is very high. That’s because the device is using aluminum scratch with glossy paint front.
To operate the amp, first turn on the power box DY-1, then the power button on the EF5. Hifiman EF5 takes about 30 seconds to warm the light bulb and wait for full operation. Two EF5 and DY-1 boxes can be placed side by side, or stacked to save space. No matter how they are used, they are cool, they sound good. The size of the amplifier is small enough for use in the office or in the bedroom. The amplifier chassis volume is enough so it does not overturn when plugged into the jack. The EF5 comes with a set of RCA inputs, an electrical connection to the DY-1 power supply.
Digital:
Shuttlecock: Fullmusic ball 12AU7 Tianjin
Socketed: OP275 op-amp at the output
Frequency Response: 20 Hz – 30kHz
Distortion: less than 0.2%
Sensitivity: more than 95dB
Input impedance: 50kOhm
Output Impedance: 2 Ohm Headphone – 2kOhm
Output power signal: up to 15 Volts at 32Ohm
Inputs: RCA (1 pair)
Output: 6.3mm headphone jack
Weight: 2.72 kg (including packaging)
Accessories: 12AU7 ball, power supply box DY-1, compatible from 110V to 240V
where can you get a Hifiman EF5 online
HiFiMan – EF-5 Headphone Amplifier: Buy it now
Listen and try
Before the Hifiman EF5, Test Lab listened to the Hifiman HE400 headset directly with the IBM T60 computer and felt the music was not sufficient due to lack of power. That’s because the HE400 headphones are big earphones, built with orthodontic technology, requiring a strong source. When listening to the HE400 headset with the source of the Denon DCD 3300 CD player, listen to the loudest volume for the new headphones. Then, after the EF5, Test Lab found the music was up enough, no shortage of transmit power.
Test Lab then continued to experience the EF5 and DY-1 with the Hifiman HE300 headset, another Hifiman headset, based on dynamic electrode technology, listening to familiar CDs, including Natalie Clein: The Romantic Cello played by cellist Natalie Clein and Charles Owen played the piano. Chopin’s cello is not as thick as that of the legendary Jacquelin du Pre cellist, but it has its own soft, romantic feel, especially in Chopin’s Cello Sonata in G minor Op65. This is a good CD. The part of the pianist is also very respectful. Cello and piano are always a good pair, although the headphones are very detailed, not to mix these two notes.
When listening to guitarist John Williams performing the select songs of Augustin Barrios Mangore (CDA-6201), Test Lab acknowledges that this headphone amplifier produces a very warm, Pressure, soft but still enough echoes, groans, background and especially bounce. Test Lab has listened to this John Williams CD many times and it is one of the criteria for staging. In it there are better copies than Vals No3 (no. 1); La catedral (Cathedral, number 5); Una limosna por el amor de Dios (La ultima cancion, 8); Choro de saudade (No. 12) and Sueno en la floresta (Garden Dream, No. 16). A disc is not boring but that is a way of saying that if the device is bored, it can not be heard.
Listen to the “gentle music” by TAS (The Absolute Sound) recruitment. It was TAS 2009, the first Hjartespel by Majorstuen, Majorstuen Fiddiers Company recorded. The harmonies of the harmonica and modern percussion and bass … Or as the Summertime by Duo Balance show, Stockfisch Records sound great. The female voice is a little deep, slightly husky but very bright on the bass accompaniment. The bass though many, but also did not make the music tangled. Whether performed by lesser bands, fewer musical instruments, the tracks in TAS 2009 also have a lot of sound that requires detailed processing. Listening to the HE300, the bass is not very compact yet. Switch to listening with Focal Spirit One headphones, clearer music, soft, bass, clean tail. TAS 2009 has a number of classic items for beginners to listen to this type of music.
